An electronic control device includes an audio and/or video recorder, for example, packaged as a user-replaceable battery module. The audio and/or video recorder records audio and/or video information for a period beginning prior to receiving of a signal by the module. The signal may be a trigger signal, provided by the electronic control device. Use of the weapon module is documented by recorded audio and/or video information for the period, for example, extending a while before and after operation of the trigger.